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Graphene Network Organisation in Conductive Polymer Composites |
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| Authors: | Yuliya V. Syurik Marcos G. Ghislandi Evgeniy E. Tkalya Garry Paterson Damian McGrouther Oleg A. Ageev Joachim Loos |
| Affiliation: | 1. Taganrog Institute of Technology, Shevchenko Street 2, Taganrog 347928, Russia;2. Laboratory of Materials and Interface Chemistry, Eindhoven University of Technology, Den Dolech 2, Eindhoven, 5600 MB, The Netherlands;3. Department of Polymer Chemistry, Eindhoven University of Technology, Den Dolech 2, Eindhoven, 5600 MB, The Netherlands;4. School of Physics and Astronomy, University of Glasgow, University Avenue, Glasgow, G128QQ, United Kingdom;5. School of Physics and Astronomy, Kelvin Nanocharacterisation Centre and Scottish University Physics Alliance, University of Glasgow, University Avenue, Glasgow G128QQ, United Kingdom |
| Abstract: | A latex technique is used to prepare graphene/polystyrene and graphene/poly(propylene) composites with varying GR loadings. Their electrical properties and the corresponding volume organisation of GR networks are studied. Percolation thresholds for conduction are found to be about 0.9 and 0.4 wt% for GR/PS and GR/PP with maximum obtained conductivities of 12 and 0.4 S m?1 for GR loadings of 2 wt%, respectively. Investigations using SEM and electrical conductivity measurements show that for the preparation conditions used GR forms an isotropic 3D network in the PS matrix, but GR forms a 2D network in the PP matrix. The different GR network organisations are possibly forced by the different melt flow behaviour of the matrix polymers during processing and the subsequent crystallisation of PP. |
| Keywords: | charge contrast SEM conductive network organization DC conductivity graphene composites morphology |